Use the .NET Framework Cleanup Tool to uninstall multiple versions of the .NET Framework, and then re install the components.

Restart the computer.

Visit Windows Update again, and then check for and install updates.

Try to re install the .NET Framework update.

If the issue persists, its time for a PC checkup by our technical expert:

Computers perform best when they receive regular, professional maintenance. The installation and un-installation of software, hardware, and drivers often leave remnants behind in your registry, resulting in a tangle of unused applications, broken drivers, and incomplete and empty command signals. This mass of confusion slows down your computer and if not addressed promptly can lead to serious problems such as computer freezing, programs not responding, and system crashes.